An electrocatalytic iodine oxidations-based configuration for hydrogen and I2/I3− co-productions driven by the Zn-air/iodine battery

IF 18.9 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Energy Storage Materials Pub Date : 2024-10-01 DOI:10.1016/j.ensm.2024.103817

Chang Chen , Libo Zhu , Javeed Mahmood , Zhong-Hua Xue , Xu Yu , Qin Li , Ziwei Chang , Han Tian , Fantao Kong , Haitao Huang , Cafer T. Yavuz , Xiangzhi Cui , Jianlin Shi

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Abstract

Electrochemical water splitting and energy storage are key for a sustainable energy future, despite the challenges related to undesirable overpotentials and high voltage requirements. Herein, we introduce a synergistic approach between a low overpotential hydrogen evolution reaction (HER) and a low voltage zinc-air/iodine battery (ZAIB) by coupling with iodide oxidation half reactions. By developing a Pt/Co₃O₄ electrocatalyst in two steps and with under 2% Pt loading, we achieve an unprecedented low full cell potential for hydrogen generation at 0.574 V, exhibiting an ultra-high reduction of energy consumption of 64.7%. The Pt/Co₃O₄ electrode also enables ZAIB to record a power density of 154 mW cm⁻² at an ultra-low charging potential of 1.68 V. Mechanistic studies and DFT calculations of the novel electrode confirm an electron rich Pt-Co interface and favorable Pt-I interactions, facilitating both HER and IOR reactions. Our design provides critical technology for potential large-scale renewable energy projects.

Abstract Image

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由锌-空气/碘电池驱动的基于电催化碘氧化的氢和 I2/I3- 共生配置

尽管存在与不良过电位和高电压要求相关的挑战，但电化学水分离和能量存储是未来可持续能源的关键。在此，我们通过与碘氧化半反应的耦合，介绍了一种低过电位氢进化反应（HER）与低电压锌-空气/碘电池（ZAIB）之间的协同方法。通过分两步开发铂/Co3O4 电催化剂，在铂载量低于 2% 的情况下，我们实现了前所未有的 0.574 V 低全电池制氢电位，能耗降低了 64.7%。铂/Co3O4 电极还使ZAIB 在 1.68 V 的超低充电电位下达到了 154 mW cm-2 的功率密度。对这种新型电极进行的机理研究和 DFT 计算证实，富电子的铂-钴界面和有利的铂-碘相互作用可促进 HER 和 IOR 反应。我们的设计为潜在的大规模可再生能源项目提供了关键技术。

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来源期刊

Energy Storage Materials Materials Science-General Materials Science

CiteScore

33.00

自引率

5.90%

发文量

652

审稿时长

27 days

期刊介绍： Energy Storage Materials is a global interdisciplinary journal dedicated to sharing scientific and technological advancements in materials and devices for advanced energy storage and related energy conversion, such as in metal-O2 batteries. The journal features comprehensive research articles, including full papers and short communications, as well as authoritative feature articles and reviews by leading experts in the field. Energy Storage Materials covers a wide range of topics, including the synthesis, fabrication, structure, properties, performance, and technological applications of energy storage materials. Additionally, the journal explores strategies, policies, and developments in the field of energy storage materials and devices for sustainable energy. Published papers are selected based on their scientific and technological significance, their ability to provide valuable new knowledge, and their relevance to the international research community.